<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>CSS3实现照片墙</title>
	<link href="css/style.css" type="text/css" rel="stylesheet">
</head>

<body>

	<div class="container" id="container"></div>
	
	<script src="js/jquery-1.11.1.min.js"></script>
	<script>
		$(function () {
			var count = 0;
			var selectFlag = false;
			var startFlag = false;
			var roundBox;
			$("#container").css("width", window.innerHeight * 4 / 3)
			var appendPic = function (item) {
				if (selectFlag) {
					return
				}
				var x = Math.random() * 4,
					y = Math.random() * 4
				if (!heartFunc(x, y)) {
					appendPic(item)
				} else {
					var back = "jpg";
					var imgNum = 10;
					if (item % imgNum == 1) {
						back = "gif"
					}
					if (item % imgNum == 2 || item % imgNum == 3 || item % imgNum == 4) {
						back = "png"
					}
					var html = '<img src="img/img' + item % imgNum + '.' + back + '" class="picBase" id="pic-' + item + '"  />'
					$("#container").append(html)
					setTimeout(function () {
						$("#pic-" + item).css("top", 45 + 25 * (2 - y) * 0.85 + "%").css("left", 50 + 25 * (2 - x) * 0.85 + "%")
							.css("transform", "rotate("+(25 * (0.5 - Math.random())) + "deg) translate(-50%,-50%)")
							.css("width", "100px").css("height", "100px")
					}, 500);

				}

			}
			var init = function () {
				for (var i = 1; i < 100; i++) {
					appendPic(i)
					count++
				}
				// setTimeout(function () {
				// 	if(selectFlag){
				// 		return
				// 	}
				// 	appendPic(count)
				// 	count++;
				// 	init()
				// }, 1000);				
			}
			var selectFunc = function () {
				$(".surprise").removeClass("surprise").css("transform", "rotate("+(25 * (0.5 - Math.random())) + "deg) ")
				$("#pic-" + Math.floor(Math.random() * count)).addClass("surprise")		
				$(".start").removeClass("start")		
			}
			var comfirmFunc = function () {				
				startFunc();
			}
			var startFunc = function () {
				$(".surprise").removeClass("surprise")
				roundBox= window.setInterval(function(){
					
				$(".start").removeClass("start")
					for (var i = 1; i < count; i++) {
					if(i%20==Math.floor(Math.random() * 20)){
						$("#pic-" + i).addClass("start")
					}					
				}
				},200)				
			}

			var enterNum=0
			$(document).keydown(function (e) {
				selectFlag = true;
				if (!e) var e = window.event;
				if (e.keyCode == 32) { //选
					if(enterNum%2==0){
						startFunc();
					}else{			
						startFlag=true		
						window.clearInterval(roundBox)					
						$(".start").removeClass("start")
						selectFunc();
					}
					enterNum++
					// startFunc();
				}
				if (e.keyCode == 13) { //存
					comfirmFunc();
				}
			});


			var heartFunc = function (x, y) {
				// console.log(x,y)
				if (x >= 0 && x < 1) {
					if (y < (x + 3) && y > (-x + 2)) {
						return true
					}
				} else if (x >= 1 && x < 2) {
					if (y < (-x + 5) && y > (-x + 2)) {
						return true
					}
				} else if (x >= 2 && x < 3) {
					if (y < (x + 1) && y > (x - 2)) {
						return true
					}
				} else if (x >= 3 && x < 4) {
					if (y < (-x + 7) && y > (x - 2)) {
						return true
					}
				}
				return false
			}

			init();
		})
	</script>
</body>

</html>